OK, let's work through this together. We're starting with 600 and we're going to multiply it by 24, which means we add 600 to itself 24 times.
Step 1: 0 + 600 = 600
Step 2: 600 + 600 = 1200
Step 3: 1200 + 600 = 1800
Step 4: 1800 + 600 = 2400
Step 5: 2400 + 600 = 3000
Step 6: 3000 + 600 = 3600
Step 7: 3600 + 600 = 4200
Step 8: 4200 + 600 = 4800
Step 9: 4800 + 600 = 5400
Step 10: 5400 + 600 = 6000
Step 11: 6000 + 600 = 6600
Step 12: 6600 + 600 = 7200
Step 13: 7200 + 600 = 7800
Step 14: 7800 + 600 = 8400
Step 15: 8400 + 600 = 9000
Step 16: 9000 + 600 = 9600
Step 17: 9600 + 600 = 10200
Step 18: 10200 + 600 = 10800
Step 19: 10800 + 600 = 11400
Step 20: 11400 + 600 = 12000
Step 21: 12000 + 600 = 12600
Step 22: 12600 + 600 = 13200
Step 23: 13200 + 600 = 13800
Step 24: 13800 + 600 = 14400

So, 600*24 = 14400